Melissa McCarthy turned heads and sparked fresh speculation about her weight loss when she showed off her slimmest figure yet at the recent premiere of her latest film, Paul Feig's comedy Spy.

The 44-year-old Mike & Molly star, who will soon launch her own clothing line, which will include plus sizes, was asked about her body transformation on CBS This Morning on Wednesday. She has not revealed how many pounds she has lost or when she began her weight loss journey, which appears to have taken place gradually over the past year.

"Melissa, can I say you look great? I saw you on the red carpet with one of your designs and...I was saying, 'Listen, I'm about to sign up for Weight Watchers for the third time, because I do know it works, and you're doing something that's working for you," co-host Gayle King said. "Do you want to say what it is?"

(Pictured above: Left: McCarthy attends the Spy premiere in New York on Tuesday. / McCarthy attends the 2014 Emmy Awards in Los Angeles last August.)

Clinical research has shown that stress is positively associated with weight gain.

"I truly stopped worrying about it," McCarthy said on CBS This Morning. "I stopped over-analyzing, over-thinking, over-doing anything. I kinda went back to when I was pregnant and I just stopped constantly being worried about it and I think there's something to kinda loosening up and not being so nervous and rigid about it that, bizarrely, has worked. I could've figured that out before 44, but whatever."

McCarthy and husband Ben Falcone are parents to two daughters, Vivian, 8, and Georgette, 5.